QA/G-4 provides non-mandatory guidance on developing Data Quality Objectives (DQOs) using a systematic planning process based on the graded approach. The guidance presents a step-by-step description of the DQO process. The Aug 2000 version supercedes the Sept 1994 version.

QA/G-5i will provide guidance on data quality indicators (DQIs), including the PARRC parameters (i.e., precision, accuracy, reproducibility, representativeness, and comparability) and how they fit into the implementation of the DQO process. The guidance discusses the role of DQIs in sampling and analytical measurements.

Peer review of this document is complete. A final version has been drafted but has not been released as yet. Target date: Unknown.

QA/G-5M adapts the current EPA QA/G-5 for modeling projects emphasizing applicable QA Project Plan elements for example, assessment of acquired data and software/hardware configuration testing. Issues such as regulatory task focused systematic planning and the use of the graded approach to match model complexity to the need for evaluation and testing are also addressed.